Overview
The SI8901D-A02-GS from Skyworks Solutions Inc. is part of the Si8900/1/2 series of isolated monitoring Analog-to-Digital Converters (ADCs). These devices are designed to serve as linear signal galvanic isolators, level shifters, and ground loop eliminators. They integrate a 10-bit Successive Approximation Register (SAR) ADC subsystem, a supervisory state machine, and an isolated serial port, specifically an I2C/SMBus port for the SI8901 model. The devices are built using proprietary CMOS isolation technology and are available with either 2.5 kV or 5 kV isolation ratings, ensuring robust performance in noisy and high-voltage environments.
Key Specifications
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Side Supply Voltage | VDDA | With respect to GNDA | 2.7 | 3.6 | V | |
| Input Side Supply Current | IDDA | VDDA = 3.3 V, Si890x active | 10 | 13.3 | mA | |
| Input Side Supply Current | IDDA | VDDA = 3.3 V, Si890x idle | 8.6 | mA | ||
| ADC Resolution | 10-bit | |||||
| ADC Conversion Time | 2.5 µs | |||||
| Isolation Voltage | 5 kV | Vrms | ||||
| Temperature Range | –40 | +85 | °C | |||
| I2C/SMBus Speed | 240 kbps | |||||
| Transient Immunity | 45 kV/µs |
Key Features
- Integrated 10-bit SAR ADC subsystem with three-channel analog input multiplexer and selectable gain amplifier (1x or 0.5x gain).
- Isolated I2C/SMBus port operating at up to 240 kbps.
- Proprietary CMOS isolation technology with 5 kV isolation rating.
- Transient immunity of 45 kV/µs for robust performance in noisy environments.
- Operating temperature range of –40 to +85 °C.
- Safety certifications include UL, CSA, and VDE approvals.
- Available in 16-pin SOIC wide-body packages.
Applications
The SI8901D-A02-GS is suitable for various applications requiring isolated signal monitoring and conversion. These include:
- Power-delivery systems.
- Solar inverters.
- Industrial control systems.
- Medical devices requiring isolation.
- Automotive systems where high voltage and noise immunity are critical.
Q & A
- What is the primary function of the SI8901D-A02-GS?
The primary function is to serve as an isolated monitoring ADC, converting analog input signals into digital format and transmitting the data via an I2C/SMBus port. - What is the resolution of the ADC in the SI8901D-A02-GS?
The ADC has a 10-bit resolution. - What is the maximum speed of the I2C/SMBus port?
The I2C/SMBus port operates at up to 240 kbps. - What is the isolation voltage rating of the SI8901D-A02-GS?
The device has a 5 kV isolation voltage rating. - What is the operating temperature range of the SI8901D-A02-GS?
The operating temperature range is –40 to +85 °C. - What safety certifications does the SI8901D-A02-GS have?
The device is certified by UL, CSA, and VDE. - How many analog input channels does the SI8901D-A02-GS have?
The device has three analog input channels. - What is the typical conversion time of the ADC?
The typical conversion time is 2.5 µs. - What type of package is the SI8901D-A02-GS available in?
The device is available in a 16-pin SOIC wide-body package. - What is the transient immunity performance of the SI8901D-A02-GS?
The device has a transient immunity performance of 45 kV/µs.
